On: How Many Engineers Does It Take To Make Hotmail Work In Google Chrome?

Interesting. I expected Gmail to hold the majority share, rather than AOL/Hotmail/Yahoo. I guess I just spend too much time on the internet.

Gmail is relatively new compared to those other services you mention, which have been operating for years before Gmail started in 2004. As the article mentions, Gmail use is on the rise, and expected to overtake Hotmail's lead.